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Macdonald, F. M.; Lingard, V. M.

doi:10.1007/978-1-4899-7270-5_12

Cited by 2 publications

(3 citation statements)

References 752 publications

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“…At a photon energy of 30 eV, the light is approximately 75% circularly polarized. 15 The base pressure in the system, with the ultrahighvacuum chamber open to the synchrotron, was 1 ϫ10 Ϫ9 mbar. Hence data collection was performed immediately after flashing the crystal to 2500 K ͑while it was still cooling͒ in order to minimize the degree of surface contamination.…”

Section: Methodsmentioning

confidence: 99%

Magnetic asymmetry in photoemission from Fe(100) with linearly polarized synchrotron radiation

Sirotti

Rossi

1994

Phys. Rev. B

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In an attempt to measure classical circular dichroism ͑CD͒ in the photoemission of electrons from a solid surface, valence-band photoemission from clean and adsorbate-covered chiral metal surfaces has been investigated using circularly polarized synchrotron radiation. An experimental geometry was used whereby q ជ , the polarization of the radiation, k ជ , the wave vector of the photoemitted electrons, and n ជ , the surface normal, were coplanar. It was anticipated that by doing this, so-called CDAD ͑circular dichroism in the angular distribution͒ effects associated with chiral photoemission geometries would be decoupled from classical CD arising from the difference in absorption cross-section for left and right circularly polarized light of electrons in energy states associated with R and S kinks. However, from the magnitude of the effects observed, it is evident that any classical CD features in the photoelectron spectrum arising from kinks, including photoemission from surface states or resonances, are swamped by other dichroic effects. We conclude that final-state effects in the diffraction of photoelectrons dominate the intensity of all peaks observed in angle-resolved photoemission from chiral, single crystal, metal surfaces using circularly polarized photons.

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Section: Methodsmentioning

confidence: 99%

Magnetic asymmetry in photoemission from Fe(100) with linearly polarized synchrotron radiation

Sirotti

Rossi

1994

Phys. Rev. B

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“…Heat loss through evaporation, convection, and immature skin increases the risk of hypothermia. 8 To combat these types of heat loss, the ACOG and the AAP recommend placing infants in a polyethylene bag or plastic wrap at delivery. 1 4 Polyethylene bags have been shown to prevent heat loss and improve admission temperatures.…”

Section: Discussionmentioning

confidence: 99%

“…An exposed preterm neonate's skin temperature decreases approximately 0.5 to 1.0°C per minute. 8 DCC increases the time between birth and being placed under radiant heat, potentially resulting in hypothermia. Hypothermia (temperature of <36.5°C) can be associated with increased morbidity and mortality.…”

mentioning

confidence: 99%

Thermoregulation-Focused Implementation of Delayed Cord Clamping among <34 Weeks' Gestational Age Neonates

Orton,

Theilen,

Clark

et al. 2023

Am J Perinatol

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Objective Delayed cord clamping (DCC) is recommended for all neonates; however, adapting such practice can be slow or unsustainable, especially among preterm neonates. During DCC neonates are exposed to a cool environment, raising concerns for neonatal hypothermia. Moderate hypothermia may induce morbidities that counteract the potential benefits of DCC. A quality improvement project on a thermoregulation-focused DCC protocol was implemented for neonates less than 34 weeks' gestational age (GA). The aim was to increase the compliance rate of DCC while maintaining normothermia. Study Design The DCC protocol was implemented on October 1, 2020 in a large Level III neonatal intensive care unit. The thermoregulation measures included increasing delivery room temperature and using heat conservation supplies (sterile polyethylene suit, warm towels, and thermal pads). Baseline characteristics, the compliance rate of DCC, and admission temperatures were compared 4 months' preimplementation and 26 months' postimplementation Results The rate of DCC increased from 20% (11/54) in preimplementation to 57% (240/425) in postimplementation (p < 0.001). The balancing measure of admission normothermia remained unchanged. In a postimplementation subgroup analysis, the DCC cohort had less tendency to experience admission moderate hypothermia (<36°C; 9.2 vs. 14.1%, p = 0.11). The DCC cohort had more favorable secondary outcomes including higher admission hematocrit, less blood transfusions, less intraventricular hemorrhage, and lower mortality. Improving the process measure of accurate documentation could help to identify implementation barriers. Conclusion Performing DCC in preterm neonates was feasible and beneficial without increasing admission hypothermia. Key Points

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M

Cited by 2 publications

References 752 publications

Magnetic asymmetry in photoemission from Fe(100) with linearly polarized synchrotron radiation

Magnetic asymmetry in photoemission from Fe(100) with linearly polarized synchrotron radiation

Thermoregulation-Focused Implementation of Delayed Cord Clamping among <34 Weeks' Gestational Age Neonates

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